Stronger Roots Healthier Hair

Finding more hair than usual on your pillow, in the shower, or on your hairbrush can be frustrating. Some hair shedding is normal, but if it becomes excessive or your hair starts looking thinner, it may help to understand what is happening beneath the surface.

Hair loss can have several causes, including genetics, hormones, stress, and medical conditions. Nutrition also plays an important role. Hair follicles need a steady supply of nutrients to support their normal growth cycle. When the body does not get enough of certain vitamins, minerals, or protein, hair growth may be affected.

But which nutritional deficiencies are actually linked to hair loss? Could low iron, vitamin D, zinc, or biotin be responsible? And can hair vitamins really make a difference?

Let’s explore what research says about hair health and nutritional deficiencies.

How Does Hair Grow?

Hair grows in cycles, and each follicle passes through several phases.

Anagen: The Growth Phase

This is the active growth phase. Hair follicles produce new hair, and this phase can last for several years.

Catagen: The Transition Phase

Hair growth slows, and the follicle begins to shrink. This phase typically lasts a few weeks.

Telogen: The Resting Phase

Hair temporarily stops growing and eventually sheds, allowing a new hair to grow.

Losing some hair every day is normal. However, when more follicles than usual enter the shedding phase, hair thinning may become noticeable.

One common type of hair loss is called telogen effluvium. It may occur after physical or emotional stress, an illness, surgery, significant weight loss, or nutritional deficiencies. It often causes increased shedding across the scalp rather than a single bald patch.

Hair loss can also result from genetics, hormonal changes, autoimmune conditions, or scalp disorders. Understanding the type and cause of hair loss can help guide the right approach.

Can Nutritional Deficiencies Cause Hair Loss?

Yes. Certain nutritional deficiencies can contribute to hair shedding and changes in hair growth. Hair follicles are among the body’s metabolically active tissues and need adequate energy, protein, and micronutrients to function normally.

However, vitamin deficiencies do not explain every case of hair loss. Nutrients to consider include:

• Iron
• Vitamin D
• Zinc
• Biotin
• Vitamin B12
• Protein
• Other essential vitamins and minerals

Iron

Iron helps transport oxygen and supports normal bodily functions. Low iron stores may be associated with certain types of hair loss. Sources include red meat, lentils, beans, spinach, and seafood.

Do not start taking iron supplements without confirming a deficiency through appropriate testing and consulting a healthcare professional. Too much iron can be harmful.

Vitamin D

Vitamin D supports bone health and immune function. Low levels have been associated with some hair disorders, although vitamin D deficiency is not the cause of every type of hair loss.

Sources include sunlight, fatty fish, egg yolks, and fortified foods. It is best to confirm a deficiency before taking supplements; additional vitamin D does not guarantee hair growth.

Biotin

Biotin, also known as vitamin B7, supports metabolic processes. It is found in eggs, nuts, seeds, salmon, meat, sweet potatoes, and legumes.

Severe biotin deficiency may cause hair thinning, but it is uncommon. Evidence that extra biotin improves hair growth in people who are not deficient is limited. High doses may also interfere with the accuracy of some blood tests, so tell your doctor if you take biotin.

Zinc

Zinc supports cell growth and healthy hair follicles. Severe zinc deficiency may contribute to hair loss. Sources include meat, shellfish, dairy products, chickpeas, and nuts.

Excessive zinc supplementation may cause nausea and reduce copper absorption.

Vitamin B12

Vitamin B12 is essential for blood and nervous system health. The risk of deficiency is higher among vegans, older adults, people with digestive or absorption problems, and those taking certain medications for a long time.

Vitamin B12 is found in meat, fish, eggs, dairy products, and fortified foods. Evidence linking B12 deficiency directly to common hair loss is limited.

Protein

Hair is made primarily of keratin, a protein. The body needs enough protein to support hair growth. Severe or prolonged protein deficiency may disrupt hair growth, particularly during restrictive dieting or significant weight loss.

Sources include eggs, chicken, fish, meat, legumes, dairy products, and tofu. Protein supplements can help meet dietary needs, but they are not a treatment for hair loss.

Other Causes of Hair Loss

Hair loss may result from hormonal changes related to pregnancy, childbirth, menopause, or thyroid disorders. Other possible causes include genetics, severe stress, rapid weight loss, medical conditions, and certain medications.

If hair loss is sudden, persistent, or significant, it is best to investigate the cause rather than try supplements at random.

How Is the Cause Identified?

A vitamin deficiency cannot be identified reliably from the appearance of your hair alone. A healthcare professional can assess your symptoms, medical history, diet, and pattern of hair loss, and may recommend blood tests depending on your situation.

Not everyone needs the same tests. The American Academy of Dermatology recommends identifying the cause of hair loss before choosing a treatment.

Are Hair Supplements Helpful?

Supplements may be useful when a nutritional deficiency has been confirmed, dietary intake is inadequate, or a healthcare professional recommends them. However, they may not address hair loss caused by genetics, hormonal disorders, autoimmune conditions, scalp inflammation, or certain medications.

Excessive intake of some nutrients, such as vitamin A and selenium, may contribute to hair loss or other health problems.

Habits That Support Hair Health

• Eat a varied diet that includes vegetables, fruit, whole grains, protein, and healthy fats.
• Get enough protein and include iron-rich foods alongside foods rich in vitamin C.
• Avoid restrictive diets and rapid weight loss.
• Stay physically active, get enough sleep, and make time for rest and relaxation.
• Limit heat styling, harsh chemical treatments, and hairstyles that pull tightly on your hair.

How to Choose a Hair Supplement

Check the ingredients and amounts, choose a reputable product, and consider your nutritional needs as well as potential interactions with medications or medical tests. Higher doses do not necessarily produce better results, and supplements cannot guarantee that hair loss will stop or be reversed.

Frequently Asked Questions

Can stress cause hair loss?

Yes. Severe stress may trigger telogen effluvium.

Does everyone need a multivitamin?

No. A multivitamin may help address inadequate dietary intake, but it will not necessarily treat hair loss caused by other factors.

Can taking too many vitamins cause hair loss?

Yes. Excessive intake of vitamin A or selenium, for example, may contribute to hair loss.

When might hair improve after a deficiency is corrected?

Recovery time varies depending on the cause, severity, and duration of the deficiency. Because hair grows gradually, improvement may take several months.

Hair Care Starts with Your Health

Hair is influenced by genetics, hormones, lifestyle, health, and nutrition. Some deficiencies may contribute to hair loss, but taking more vitamins does not automatically mean healthier hair. The best approach is to identify your needs and any potential deficiencies, then choose products based on evidence.

At Avnzor, we believe beauty and health go hand in hand. Looking after your hair starts with looking after yourself.

Discover essential nutrients to complement your hair and wellness routine.

Disclaimer: This article is for general educational purposes only and is not medical advice. Hair loss has many possible causes, and supplements are not suitable treatments for everyone. Use supplements according to your individual nutritional needs and the guidance of a healthcare professional. Excessive intake of some vitamins and minerals can be harmful. Consult a qualified healthcare professional or dermatologist if you experience sudden, severe, or persistent hair loss.